DMXQueryVersion(3X) UNIX Programmer's Manual DMXQueryVersion(3X)
NAME
DMXQueryVersion - determine DMX extension version
SYNOPSIS
#include <X11/extensions/dmxext.h>
Bool DMXQueryVersion(Display *dpy,
int *major_version,
int *minor_version,
int *patch_version);
DESCRIPTION
DMXQueryVersion() returns version information about the DMX
protocol extension.
Any incompatible changes to the protocol will be indicated
by a change in major_version. Small, upward-compatible
changes will be indicated by a change in minor_version. In
general, patch_version is for informational purposes and
will encode the date of the last protocol revision (e.g.,
20040604).
RETURN VALUE
If the DMX protocol extension is available, major_version,
minor_version, and patch_version will be set, and True will
be returned. Otherwise, False will be returned.
NOTES
At the time of this writing, the DMX protocol is at version
2.2.
Version 2.2 was the final development version, and code sup-
porting this version was submitted to upstream X server
repositories in the summer of 2004.
Version 1.5 was the last of the 1.x series, which was used
for development before screen and input addition and removal
were supported. Version 2.0 and 2.1 were development ver-
sions that partially supported screen and input addition and
removal.
Since we do not expect development versions to be widely
used, we recommend that any software that uses the DMX pro-
tocol extension to support only versions 2.2 and above
(although they should detect earlier versions and either
reduce functionality or fail gracefully).
SEE ALSO
DMXQueryExtension(3X), DMX(3X), Xdmx(1)
XFree86 Version 4.5.0 1